One of the blackwhite wires is a switch leg going to the electrical box where the switch was for the light. According to the chart above youd need a 3x2x3 12 inch device box if you were wiring with 12 gauge wire.

Electricial Ceiling Box Has 4 Wires Diy
4 wires in ceiling box. Split the incoming hot wire into a y and connect it to a terminal on each switch. The jumper wire does not count as a conductor. The instructions that came with the fan show three wires coming from the ceiling box for a single switch light. Then just connect all your white wires together. Question about electrical wiring in the ceiling. If wanting to control the fan from the existing wall switch the ceiling box red wire will splice to the ceiling fan black wire and the fan will be controlled by the wall switch.
Ceiling light wiring help. The fourth black hot wire appears to feed toward the fan wall switch exiting the box at the top right. Connect white wires together. There are four black wires and four white wires and no ground wires. 1 if the ceiling box only contains 1 black 1 red 1 white and 1 bare copper ground wire and the red is the switched loop coming off of the switch. American professional electrical advice forum.
Then take the red wire and the black wire from the 3 wire cable and attach them to eachother and to the black wire of the light fixture. Im about to install several hunter ceiling fans. This box is controlled by one light switch that controlled both the fan and light at the same time. Sounds like an older house where many wires come together in a light fixture box on the ceiling. In the switch box. Twist the black wire from the ceiling fan kit together with the black wire from the electrical box and connect the exposed ends with a wire nut.
Likewise twist all of the white wires together. The switch switches that hot line and sends the switched power back to this box on the white wire part of the top right bundle. Short circuit bypasses. Connect the blue wire to the red wire. The fan load is then connected between this switched white wire and the neutral bundle. Connect black fan wire to the black ceiling wire.
Wiring a 2 wire ceiling rose to a pendant light. When i remove the light there are. Connect the black wire to the screw located in swith 1. Connect the red wire to the screw in switch 2. When i unhooked the ceiling fan i found that there are four different sets of wires coming into the ceiling box. To have 4 whites and 4 blacks you have 4 separate 2 wire cables coming into the box.
Ok in the 4 wire cable take the black wire and cap it off and push it to the side. You count one for each of the four insulated wires two for the switch one for all the bare ground wires and one for the cable clamps.